problems with setting kern.maxdsiz in /boot/loader.conf

From: Alan Jay (alan_at_cyclopsvision.co.uk)
Date: 05/06/05

  • Next message: Christophe Yayon: "Re: pthreads and nagios issue" 
    To: <freebsd-stable@freebsd.org>
Date: Fri, 6 May 2005 19:14:43 +0100

    I am running 5.4 RC4 and rebooted today after changing one of the boot-time
    variables (maximum data size) in /boot/loader.conf. I took it from 512MB to
    2GB of RAM in order to improve the MySQL performance on the server.

    However, upon reboot, the following error comes up:

    Fatal trap 9: general protection fault while in kernel mode cpuid = 0; apic id
    = 00
    instruction pointer = 0x58:0x8bc
    stack pointer = 0x10:0xf80
    frame pointer = 0x10:0x0
    code segment = base 0xc00f0000, limit 0xffff, type 0x1b
                            = DPL 0, pres 1, def32 0, gran 0
    processor eflags = interrupt enabled, resume, IOPL = 0
    current process = 0 (swapper)
    trap number = 9
    panic: general protection fault
    cpuid = 0
    Uptime: 1s

    I tried resetting kern.maxdsiz backto 512MB by pressing 6 at the boot menu and
    doing:
            unset kern.maxdsiz
            set kern.maxdsiz=536870912
            show kern.maxdsiz
        - this did not have any effect - exactly the same thing happened again.

    Is the kern.maxdsiz now being reset or being reset by /boot/loader.conf after
    changing things in the loader does anyone have any ideas.

    Nothing else has changed on the server which is being prepared for use at the
    moment and was updated to 5.4 RC4 just a few days ago but which has been
    running fine and rebooting fine since then until this change.

    Any ideas?

    Thanks in advance

    Alan

    PS I assume the only way to remove /boot/loader.conf is to use the 2nd CD set
    in fixit mode and remove / edit the file after mounting the root partition.

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  • Next message: Christophe Yayon: "Re: pthreads and nagios issue"

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